Sewing machine



April 6 @1926. 1,579,550

' W. B. LONG .ET AL.

SEWING MACHINE F d May 19, 1924 4 Sheets-Sheet 1 April 6, 192 1,579,550

w.- B. LONG*ET AL I SEWING MACHINE Fil d May 19 192 4 Sheets-Sheet 2 1sur I l 5% I I; I q i-"l April 6 ,1926.

I. B. LONG ET AL. I

SEWING MACHINE Filed May 1924 Patented Apr; 6, 926.

' v winnmm B; Lona; AND N rr AN n; m omor cmcmo', rnmiiors, ns sreflmbns "no r 'UNI N C ILLINOIS.

MncHrNn ooMraNit, or onicneo, Immoral 'conronn'rronfor snwmo MACHINE.

7 '0 all 'w/wmit may-concern: I

f Be it known that we, lViLLiAM' B. Leno: and NATHAN E.HANsoN,-,citizens of the United States, residing at vChicago, in thecounty of Cook; State of Illinois, have vi11- vented ecertain new 1 anduseful Improvements in Sewing Machines,- of which the-following is r adescription, reference :being had to the accompanying drawing and: tothe,inachine taken 19 figures of reference -marke'd thereon. 'The'invention relates to new a'ndiuseful improvements in sewing machines,and, more a particularly to: a two-needle overedge sew the innerneedle,orneedle which penetrates the fabric and moves said thread toward thefront ofthe'machine-where it-can'be engaged by a hook, and the hookcarries the needle thread laterally to a position where it maybe'entered by the other needle, that is; the

needle-which goes over the edge; Such'a machine is shown andidescribedinthe .pat-

V 'ent granted February-19,191 8 't'o Robert R;

object ofthe present: invention is to provide a rigid bracketstructurewhich is capable of. supporting both the oscillating finger andthe. oscillating hook, which bracket structure is adapted-to be attachedThese and other to an ordinary two-needle sewing head, and. whichbracket structure operatestov'insure the proper 'co-ordination andalinement-of,

objects williiri part be 7 obviousand will in partlbe hereinafternioreany disclosed. i I

Inthe drawings which show :by way of ;illustration one embodiment of theinven- .tionigure 1 isa frontlview-of In achine561 1- bodyingourimprovements, the work 511}?- port being omittedfor the sake ofclearnes'sl;

w F- ig. 2-is a horizontal sectionalQview' of the work snpppr jsectional view the line j 4 sa'ai t i s wi g he needles,}the I i di elyel e l litli thread finger andjthread' hook with the h ead finger at therear end of its stroke, and the thread'hook at the lefth and end ofitsstrok q Fig. 5 is a similar view but showing the finger as havingmoved across the pathof the needle carryingtheftlireadfof the lefthandneedle toward the front of the machine, and thehook as havingrbeenretra'cted to engage this thread; I i l i ciently sons to position theloopofthe left; hand needle thread carried thereby. for the righthandneedle ,to center betweenthe a, "-strandsthereof, and f r Fig. 7 -isa;plan View of thelever for carrying thethre'ad hook; I p r 5a- Themach'ne to,which. -our invention is needlebar'is reciprocatedby means ofa needle lever-5 which is connected to the needle .bar by a link 6. ,Theneedle-lever'is oscillated by an eccentric strap -7 which cotheflowerpart of the standard 2 and in the :bracket 10 at the front end of'themachine. The bracket '10 ,serves as one of the supports f *for a clothplate; -T-his needle bar is "pro- ,vided'withtwo needles 11 and 12.Cooperating withzthe needles 11 and-12 beneath the work support is athread carrying looper 1 3.

Fig. 6 shows thehook moved sufliap'pliedgconsists of a bed plate lvhaving a standard 2 carrying an overhanging arm 3 on which a needle bar4 reoiprocates. Said Said thread-carrying lo'operis given an os-:loops'land is also moved laterally so as to avoid-the needles. The.lateral movement of cillati'on into and out oftheneedle threadv I thelooper is secured through a yoke 14 which cooperates with an eccentricon the main shaft 9. The oscillations of the looper are derived from areciprocating rod 15 which is connected to the looper by means ofa-forked arm 16 and pivoted block 17.

'looper is given an extended dwell at the forward end of its stroke.This arrangement broadly of links and levers is shown, described andclaimed in our co-pending application Serial No. 714,299, filed of evendate herewith. The specific construction of "links, levers and arms foraccomplishing this purpose, form no part of our invention, but areshown, described and claimed inan application filed by Roy W. Redin,Serial No. 715,416, of even date herewith.

The present invention as has been suggested above has to do entirelywith the stitch forming elements above the work support. Associated withthe needles is a finger 24 which is adapted to move across the path ofthe lefthand needle and carry the lefthand needle thread toward thefront of the machine. Associated with this finger is a thread hook 25which moves in a direction substantially at right angles to thedirection of feed, and this hook engages a thread of the lefthand needlemoved toward the front of the machine by the finger 24 and carries itlaterally into position for the righthand needle to enter the same.

The thread finger 24 is carried by a lever 26 (see Figures 1 and 3). Thelever 26 is mounted on a fulcrum pin 27 passing through the ears 28 and29 of a bracket member 30. The work is held on the cloth plate by meansof a presser foot 31-. This presser foot is carried by a presser bar 32.

'The bracket is mounted on the presser bar. Said presser bar extendsthrough a bearing bracket 33 and a bearing bracket 34. A guide bar 35slides vertically in the lugs 36 and 37. This guide bar and the presserbar are connected. by means of an arm 38 so that they move up and downtogether. The purpose of the guide bar is to prevent the presser barfrom rotating in its bearings. At the upper end of the bracket 30 thereis a projecting split lug 39 through which the presser bar extends, andsaid lug is clamped tightly to the bar by means of a screw 40. Thebracket 30 depends below the bearing bracket 34 and the lug 37. Thepresser bar has a flatside 32 so'that when the split bearing 39 is setup against the presser bar it will be held rigidly from oscillating onsaid bar.

The upper end of the lever 26 is connected to a link 41 at 42. The otherend of the link 41 is connected to a ball stud 43 mounted on the finger24 to move outwardly across :the path of the lefthand needle as has been,re-

ferred to above. This particular link oper ating mechanism for thefinger is shown :in the patent'to Hughes abovercferred to. Inasmuch asthe bracket is mounted on the presser bar, when the presser bar islifted, the lever 26 will also be lifted,-so that the thread fingermaintains a predetermined position relative to the presser foot.

The thread hook 25 18 carried by the'lever 47.

The inner end of this lever 47 extends between the perforated lugs 48and 49 formed in the lower part of the bracket 30 and is pivotallymounted therein by means of a pivot pin 50-which is clamped to thelever. The lever is oscillated on the bracket 30 by means of a link 51which is pivoted at its inner end .to aball stud 52 carried by the arm53 of the lever 47. The rear end of the link 51 is pivotally connectedto a ball stud 54 which is fixed vto the upper end of a lever 55. Thelever 55 is mounted on a short shaft 56 carried by a bracket 57 securedby means of screws 58 58 tothe bed plate of the machine, Said lever 55intermediate -its ends carries ,a projecting ball stud 59 to which aneccentric strap 60 is connected. Said eccentric strap-6O cooperates withan eccentric 61 on the main shaft 9. It will thusibe seen that as themain shaft 9 rotates, the lever 55 will be oscillated back and .forth,and. through the link 51 will sw'ingthe lever 47 carrying the threadhook 25. Thus it is that we are able to get a very direct drive for thetln'ead'hook from the main shaft beneath the work support and at a pointcloseto the forward end of the shaft, so that the parts for operatingthe thread hook are comparatively short and comparatively few and arepositive in their actions, whereby the machine may be driven at highspeed, with little or no undesirable vibration in the parts. Thematerial is moved across the work support by means of a feed dog 62-carried by a feed bar 63 of the usual construction. The presser bar maybe readily raised and lowered carrying with it the lever supporting thethread hook, so that the thread hook always oscillates in a definiteposition relative to the presser foot. J The link 51 is pivotallyconnected to'f the lever the-parts ma be made without departing from thespirlt of the invention set forth in the appendedclaims.

' Having thus described the invention,-what '1 we claim as new anddesire to secure by Letters-Patent, 1s

f1; A sewing -machine including a" bed plate, a work support, a presserfoot for I holding the material on the work support, a presser barcarrying said presser foot, a pair of needles, a threadcarrying loopercooperating with said needles beneath the,

work support, a thread finger movable across the path of one ofsaidneedles for deflect ing the thread thereof in front. of said needle,a thread hook for engaging said deflected thread and formingalooptherein'for the other needle to enter, a lever supporting and operatingsaidfinger, a lever supporting and operating said hook, and a singleunitary bracket having a lug on which one of said levers is mounted andhaving an independent lug on which the other lever is'mount-f ed, saidbracket being carried by the presser bar and movable up and downtherewith.

2. A sewing machine including a 7 bed plate, a work support, a presserfootfor holding the material on the work support, a presser bar carryingsaid presser foot, a pair of needles, athread carrying loopercooperating with said needles beneath the work supp0it, 3 thread 7finger movableacross the path of one of said-needles for deflecting thethread thereof in front of said needle, a thread hook for engagingsaid'de fiected threadjand forming a loop therein,

for the other needle to enter, a lever oscil lating in a vertical planeand supporting and operating said finger, a lever oscillating in ahorizontal plane and supporting and operating said hook, a singleunitary bracket having alug on which one of said levers is mounted andan independent lug on which the other lever ismounted, said bracketbeing carried by the presser barand movable up and down therewith, aneedle bar, and means actuated by said needle bar for swinging saidlever carryingsaid finger.

3. A sewing machine including a bed plate, a work support, a presserfoot for holding the material on the work support, a presser barcarrying said presser foot, a pair of needles, a thread carrying looper00- operating with said needles beneath the work support, a threadfinger movable across the path ofone of said needles for deflecting thethread thereof in front. of said needle, a thread hook for engaging saiddeflectedfor theother needle to enter, a lever supthread and-forming alooptherein' for the i other needle to enter, a lever supporting and 55'by the ball stud 54." Thisballs stud is so 7 located that the link' 51'may turn "thereon when tliepresser bar is raised and lowered. It isobvious thatminiorj chaiiges in the details of -construction andarrangementof v r "saidjbracket havinga pair ofvertically'rar-"i'anged'bearing lugs, -and a short vertical shaft mounted in saidbearinglugs on which! operating 1 said finger, jlever imp porting andoperating said hook, a s-ingle unitary bracket on' which said levers aremounted; said bracket being 1 carried by the" presser bar and movable upand down therewith,

work support, a "thread finger movable 85, v

across the path 'of one of said needles for deflectingthethread thereofin front of said needle, a thread hook for engaging said defiectedthread and'forming'a loop therein porting and operating said finger, alever supporting and operating said hook-,a single unitary bracket onwhich said levers are mounted, said bracket being carried by the presserbar and movable up and down therewith, said bracket having a pair ofve1tical 1y arranged bearing lugs, a short vertical shaft mounted insaid bearing lugs on which said lever carrying said hook isfixed, a pairof horizontally arranged lugs carried by saidbracket, and a short shaftcarried by said lugs on which the lever carrying the vfinger is mounted.

5'. 'A" sewing machine including a bed 7 pair of needles, a threadcarrying looper cooperating with said needles beneath the thepath ofone'of saidneedles for-deflecting the thread thereof in front of saidneedle, a thread hook. for engaging said deflect -ed thread and forminga loop therein for the other needle to enter, a'lever supporting 115 andoperating said finger, a lever supporting and operating said hook, asingleunitary bracket on which said levers are mounted, said bracketbeing carried by the presser bar and movable up and down-there- 120bracket beneath the work support, a lever 125 V mounted on said bracket,a link connecting the upper end of said lever to the lever car-. ryingthe hook for oscillating the hook, a main shaft, beneath the worksupport, and

an eccentric rod operated therebynand con 9 plate, a work support,' apresser foot for 0 holdingthe material on the work support, a presserbar carrying said presser foot, a

{work support,-a thread finger movable across nected to said lever foroscillating the hook.

6. A sewing machine including a bed plate, a work support, a mainrotating shaft beneath the Work support, an overhanging arm, a needlebar mounted in said arm and carrying a plurality of needles, a threadfinger above the Work support for engaging the thread of one of saidneedles and defleeting it in front of the needles, a thread hook adaptedto engage said deflected thread and form a loop therein for the otherneedle toenter, a lever adapted to swing in a horizontal plane on whichsaid hook is nounted, a bracket on said bed plate beneath the Worksupport and adj acentthe stitching element, a lever mounted on saidbracket; and projecting above the Work support, a link for connectingthe upper end of said lever to the lever carrying the thread hook, aneccentric on the main shaft, and an eccentric rod operated thereby andconnected to the lever pro ect-1ng above the Work support foroscillating the same.

In testllnony whereof, We afiix our signatures.

lVILLIAM B. LONG; V NATHAN HANSON.

